Which of the following numbers will replace the question mark (?) in the given series?
9, 17, ?, 57, 89, 129
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 33.
Given series: 9, 17, ?, 57, 89, 129
The series follows this pattern:
9 + 8 = 17
17 + (8 × 2) = 17 + 16 = 33
33 + (8 × 3) = 33 + 24 = 57
57 + (8 × 4) = 57 + 32 = 89
89 + (8 × 5) = 89 + 40 = 129
So, the missing term in the series is 33.